Stylus-based pressure-sensitive area for UI control of computing device

ABSTRACT

Techniques are disclosed for interacting with a computing device using a stylus. The stylus is configured with a pressure-sensitive control feature that can be activated to perform various actions while the stylus is touching or otherwise sufficiently proximate to a stylus detection surface of the device. The pressure control feature function can be associated with a variety of tasks on the computing device such as: adjusting variables, executing a particular command, switching between tools, modifying a particular tool&#39;s settings, and launching an application. In some embodiments, the stylus-based pressure-sensitive control feature is configured to allow for squeeze actions, tapping actions, and various combinations of such pressure-types on the pressure-sensitive control feature to uniquely identify a corresponding function to be carried out on the computing device.

RELATED APPLICATIONS

This application is related to U.S. application Ser. No. 13/793,152 filed Mar. 11, 2013 and titled “Stylus-Based Slider Functionality for UI Control of Computing Device” and to U.S. application Ser. No. 13/793,256 filed Mar. 11, 2013 and titled “Stylus-Based Touch-Sensitive Area for UI Control of Computing Device.” Each of these applications is herein incorporated by reference in its entirety.

FIELD OF THE DISCLOSURE

This disclosure relates to electronic computing devices, and more particularly, to stylus-based user interface techniques for interacting with electronic computing devices.

BACKGROUND OF THE INVENTION

Electronic display devices such as tablets, eReaders, mobile phones, smart phones, personal digital assistants (PDAs), and other such touch screen electronic display devices are commonly used for displaying consumable content. The content may be, for example, an eBook, an online article or blog, images, documents, a movie or video, and the like. Such display devices are also useful for displaying a user interface that allows a user to interact with the displayed content. The user interface may include, for example, one or more touch screen controls and/or one or more displayed labels that correspond to nearby hardware buttons. The user may interact with the touch-sensitive device using fingers, a stylus, or other implement. The touch screen display may be backlit or not, and may be implemented for instance with an LED screen or an electrophoretic display. Such devices may also include other touch-sensitive surfaces, such as a track pad (e.g., capacitive or resistive touch sensor) or touch-sensitive housing (e.g., acoustic sensor).

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1a-b illustrate an example electronic computing device configured in accordance with an embodiment of the present invention.

FIG. 1c illustrates an example stylus that can be used with a computing device such as the one shown in FIGS. 1a-b , and is configured in accordance with an embodiment of the present invention.

FIGS. 1d-e illustrate example configuration screen shots of the user interface of the computing device shown in FIGS. 1a-b , configured in accordance with an embodiment of the present invention.

FIG. 2a illustrates a block diagram of an electronic computing device configured in accordance with an embodiment of the present invention.

FIG. 2b illustrates a block diagram of a stylus configured in accordance with an embodiment of the present invention.

FIG. 2c illustrates a block diagram of a communication link between the computing device of FIG. 2a and the stylus of FIG. 2b , configured in accordance with an embodiment of the present invention.

FIGS. 3a-d illustrate an example stylus configured with a pressure-sensitive control feature and for use with an electronic computing device, in accordance with an embodiment of the present invention.

FIGS. 4a-c illustrate example use cases for a stylus configured with a pressure-sensitive control feature and for interacting with an electronic computing device, in accordance with an embodiment of the present invention.

FIGS. 5a-b ′ illustrate partial views and componentry of a stylus-based, pressure-sensitive control feature configured in accordance with an embodiment of the present invention.

FIG. 6 illustrates a method for interacting with an electronic computing device using a stylus-based, pressure-sensitive control feature, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION

Techniques are disclosed for interacting with a computing device using a stylus. The stylus is configured with one or more control features that can be activated to perform various actions while the stylus is touching or otherwise sufficiently proximate to a stylus detection surface of the device. In one embodiment, the stylus includes a pressure-sensitive control feature around the stylus body in the grip area, and a pressure (such as a squeeze or tap) action on that pressure-sensitive control feature can be associated with a variety of tasks on the computing device such as: adjusting variables, executing a particular command, switching between tools, modifying a particular tool's settings, and launching an application. In some embodiments, the stylus-based, pressure-sensitive control feature allows for single-finger pressure (e.g., finger tap thumb tap) and squeeze actions (e.g., between thumb and index finger). In some such embodiments, for example, when the stylus-based, pressure-sensitive control feature is engaged with a finger tap or a thumb tap, or a squeeze action (e.g., via the user's finger and thumb together), the resulting signal can be used to change variables or tool features such as volume, font size, font type, colors, line thickness or hardness, margin size, pagination, and other such variables. In other such embodiments, the stylus-based, pressure-sensitive control feature can be engaged with a finger tap or a thumb tap, or a squeeze action to, for example, invoke an undo or redo command, to advance through content (paging/scrolling), to switch between open applications, or to launch a specific application. In some cases, the stylus may have a power source and processor or some degree of intelligence to receive and signals from the pressure-sensitive control feature, but other embodiments don't necessarily include such componentry. An appropriate animation or sound or haptic response can also be provided that may be indicative of or otherwise related to the action being taken. Other embodiments may include similar functionality with one or more different stylus-based control features, such as a push-button, a rotatable knob, a slider-switch, or a touch-sensitive surface, to name a few examples. As will be appreciated in light of this disclosure, the attributes of the control feature can be tailored to the target function or functions to be performed and/or to a targeted use case (e.g., student attending class in classroom or via a cloud-based educational program) so as to provide a more intuitive user experience.

General Overview

As previously explained, electronic display devices such as tablets, eReaders, and smart phones are commonly used for displaying user interfaces and consumable content. In some instances, the user might desire to switch tools within a particular application, or customize the settings within a particular tool in a given application. For instance, the user might wish to change the font in a word processing or eReader application, or change from a pencil tool to a paintbrush tool. While many computing devices provide for a series of actions for interacting with a device to make such changes, there does not appear to be an intuitive stylus-based user interface for doing so.

Thus, and in accordance with an embodiment of the present invention, stylus-based techniques are provided for performing functions in a computing device using stylus control feature actions while the stylus is touching or otherwise sufficiently proximate to a stylus detection surface of the device. To this end, direct contact with the stylus detection surface is not necessary. In one particular embodiment, a stylus-based, pressure-sensitive control feature around the stylus shaft in the user grip area allows for pressure-based actions such as finger taps or thumb taps, or a squeezing action on the pressure-sensitive control feature. Each stylus-based pressure action can be associated with a function such as increasing volume, increasing font size, creating a note (e.g., such as notes taken during an educational lecture, or a message for another user of the device, or a reminder, etc), undo, recording a lecture or other ambient sounds, etc. In a more general sense, any uniquely identifiable stylus-based pressure action or combination of actions performed while touching or otherwise sufficiently proximate to a stylus detection surface of the computing device may be configured to perform a stylus or device function. In some embodiments, the stylus may be pointing to a specific selection of content or a tool, a UI control feature or icon, or a specific area of a stylus-sensitive display. In such an example, the stylus-based pressure action may be used to perform an operation on the selected content, change tools, or cycle through a given tool's customizations, open the selected file or application, manipulate the UI control feature, etc. In one specific such example case, a stylus-based pressure action may be associated with a different function depending on the area of the stylus detection surface with which the stylus is directly contacting or hovering over, or otherwise sufficiently proximate to so as to cause a detectable event in that area of the stylus detection surface. In other embodiments, the stylus-based pressure action may be configured to perform a certain function regardless of whether content is selected or where the stylus is pointing. In some such selection-free embodiments, the stylus-based pressure action may perform a certain function based on a currently running application, or a specific stylus-based pressure action may be globally associated with a specific device function. For instance, a selection-free stylus-based pressure action may be used to trigger an undo or redo command, or to launch a given application (e.g., launch a browser for conducting online research, or a text messaging application to notify peers in a study group of a particular question or a new meeting time, or a sound/video recording application while attending a lecture, or an application that transcribes handwritten notes on a touch-sensitive display of the computing device into a text file). Numerous selection-free stylus-based pressure actions will be apparent in light of this disclosure, and such functions may be user-configurable or hard-coded such that no or minimal user-configuration is necessary.

In some embodiments, the pressure sensitive control feature may use quantum tunneling composites (QTC) technology or a so-called soft-switch actuator deployed around or otherwise on the nozzle or elongated body of the stylus. QTC-based actuators can be used for ultra-thin, low power pressure-sensitive switches and is available, for example, from Peratech Limited. In a more general sense, any suitable pressure-sensor technology can be used that translates user provided pressure into an actionable signal, wherein the pressure action may be in the form of a squeeze-and-release, squeeze-and-hold, touch-and-release (or tap), press-and-hold, or any other pressure-type action or combination of applied pressure actions on the pressure-sensitive area. For ease of description, a squeeze or tap is used in the various examples, but any suitable pressure-types can be used that generate a unique detection signal from the pressure-sensitive surface, as will be further appreciated in light of this disclosure. In some specific such embodiments, the stylus-based pressure function allows for finger taps, thumb taps, or squeeze actions, so as to provide for a broader range of uniquely identified pressure-based functions. As previously explained, the stylus-based pressure function can be associated with a variety of tasks on the computing device. For example, in some such embodiments, when a stylus-based, pressure-sensitive control feature is engaged with a squeeze action or a finger tap or a thumb tap, it can change variables or tool features such as volume, font size, font type, colors, line thickness or hardness, margin size, and any other such variables adjustable by a user interface control feature. In other such embodiments, the stylus-based, pressure-sensitive control feature can be engaged with a squeeze action or a finger tap or a thumb tap to invoke an undo or redo command, or to launch a specific application. In a more general sense, the stylus-based, pressure-sensitive control feature can be engaged with a squeeze or series of squeezes, a tap or series of taps, or any combination of pressure-types to invoke a specific action, in accordance with an embodiment.

In some embodiments, the pressure-based action may be combined with or otherwise preceded by a content selection action (e.g. a single item selection, a select-and-drag action, a book-end selection where content between two end points is selected, or any other available content selection technique). As will be appreciated, the stylus may be used to make the content selection, but it need not be; rather, content may be selected using any means. In one example embodiment, the user may select a section of text, and then perform the copy function (or other function assigned to a stylus control feature), which will save the selected text onto the stylus. In a more general sense, the stylus may be used to perform functions on content that was pre-selected with or without the stylus, or to simultaneously select and perform functions on target content. The degree to which the selection and other functions overlap may vary depending on factors such as the type of content and the processing capability of the stylus and/or related device.

In some example embodiments, the pressure actions are accompanied with animation, sound and/or haptic effects to further enhance the user interface experience. For example, copy animation might show a vortex or sucking of the selected content into the stylus if the stylus pressure action is being used to copy content into the stylus or other target location. In a similar fashion, a volume increase animation might show a speaker with an increasing number of sound waves coming from it if the stylus pressure action is being used to increase volume. If a selection-free, no-contact undo stylus-based pressure action is being executed, then a sound could accompany the undo function, such as a custom sound selected by the user, or any other suitable sound. A combination of animation, sound, haptic and/or other suitable notifications can be used as well, as will be appreciated in light of this disclosure.

The techniques have a number of advantages, as will be appreciated in light of this disclosure. For instance, in some cases, the techniques can be employed to provide a discreet and intuitive way for a user to interact with a device without overly distracting the user (or others nearby) from other events occurring during the interaction. For instance, in some such embodiments, a student attending a lecture (either live or via a network) can activate note taking and voice recording applications via stylus-based pressure control actions, without having to look at the device (or with minimal looking). In such cases, for instance, the student can hold the stylus generally over the stylus-sensitive surface while still maintaining focus and concentration on the lecturer and presentation materials, and readily activate tools that can supplement the educational experience.

Numerous uniquely identifiable engagement and notification schemes that exploit a stylus and a stylus detection surface to effect desired functions without requiring direct contact on the touch sensitive (stylus detection) surface can be used, as will be appreciated in light of this disclosure. Further note that any stylus detection surface (e.g. track pad, touch screen, electro-magnetic resonance (EMR) sensor grid, or other stylus-sensitive surface, whether capacitive, resistive, acoustic, or other stylus detecting technology) may be used to detect the stylus action and the claimed invention is not intended to be limited to any particular type of stylus detection technology, unless expressly stated.

Architecture

FIGS. 1a-b illustrate an example electronic computing device with a stylus detection surface configured to detect stylus-based control feature actions, in accordance with an embodiment of the present invention. As can be seen, in this example embodiment, the stylus detection surface is a touch screen surface. The device could be, for example, a tablet such as the NOOK® tablet or eReader by Barnes & Noble. In a more general sense, the device may be any computing device having a stylus detection user interface and capability for displaying content to a user, such as a mobile phone or mobile computing device such as a laptop, a desktop computing system, a television, a smart display screen, or any other device having a stylus detection display or a non-sensitive display screen that can be used in conjunction with a stylus detection surface. As will be appreciated, the claimed invention is not intended to be limited to any particular kind or type of computing device.

As can be seen with this example configuration, the device comprises a housing that includes a number of hardware features such as a power button, control features, and a press-button (sometimes called a home button herein). A user interface is also provided, which in this example embodiment includes a quick navigation menu having six main categories to choose from (Home, Library, Shop, Search, Light, and Settings) and a status bar that includes a number of icons (a night-light icon, a wireless network icon, and a book icon), a battery indicator, and a clock. Other embodiments may have fewer or additional such user interface (UI) features, or different UI features altogether, depending on the target application of the device. Any such general UI controls and features can be implemented using any suitable conventional or custom technology, as will be appreciated.

The hardware control features provided on the device housing in this example embodiment are configured as elongated press-bars and can be used, for example, to page forward (using the top press-bar) or to page backward (using the bottom press-bar), such as might be useful in an eReader application. The power button can be used to turn the device on and off, and may be used in conjunction with a touch-based UI control feature that allows the user to confirm a given power transition action request (e.g., such as a slide bar or tap point graphic to turn power off). Numerous variations will be apparent, and the claimed invention is not intended to be limited to any particular set of hardware buttons or features, or device form factor.

In this example configuration, the home button is a physical press-button that can be used as follows: when the device is awake and in use, tapping the button will display the quick navigation menu, which is a toolbar that provides quick access to various features of the device. The home button may also be configured to cease an active function that is currently executing on the device, or close a configuration sub-menu that is currently open. The button may further control other functionality if, for example, the user presses and holds the home button. For instance, an example such push-and-hold function could engage a power conservation routine where the device is put to sleep or an otherwise lower power consumption mode. So, a user could grab the device by the button, press and keep holding as the device is stowed into a bag or purse. Thus, one physical gesture may safely put the device to sleep. In such an example embodiment, the home button may be associated with and control different and unrelated actions: 1) show the quick navigation menu; 2) exit a configuration sub-menu; and 3) put the device to sleep. As can be further seen, the status bar may also include a book icon (upper left corner). In some cases, selecting the book icon may provide bibliographic information on the content or provide the main menu or table of contents for the book, movie, playlist, or other content.

FIG. 1c illustrates an example stylus for use with an electronic computing device configured in accordance with an embodiment of the present invention. As can be seen, in this particular configuration, the stylus comprises a stylus tip used to interact with the stylus detection surface (by either direct contact or hover over interaction, or otherwise sufficiently proximate indirect contact) and control features including a top button and a pressure-sensitive control feature along and/or around the shaft of the stylus. In this example, the stylus tip has a rounded triangular shape, while in alternative embodiments the stylus tip may be more rounded, or any other suitable shape. The stylus tip may be made of any number of materials of different textures and firmness depending on the needs of the specific device. The stylus may include fewer or additional control features than those illustrated in FIG. 1c , or different control features altogether. Such control features may include, for example, a rotating knob, a switch, a touch-sensitive switch, a slider switch, or other suitable control feature that will be apparent in light of this disclosure. The principles disclosed herein equally apply to such control features. Various stylus examples depicted and discussed herein are provided with pressure-sensitive control features, which may provide the user with an enhanced user experience. The stylus may be an active or passive stylus, or any other suitable implement for interacting with the device and performing direct (touching) or indirect (not touching, but sufficiently close so as to be detectable by the stylus detection surface) contact actions. As will be appreciated, the claimed invention is not intended to be limited to any particular kind or type of stylus.

In one particular embodiment, a stylus control feature action configuration sub-menu, such as the one shown in FIG. 1e , may be accessed by selecting the Settings option in the quick navigation menu, which causes the device to display the general sub-menu shown in FIG. 1d . From this general sub-menu, the user can select any one of a number of options, including one designated Stylus in this specific example case. Selecting this sub-menu item may cause the configuration sub-menu of FIG. 1e to be displayed, in accordance with an embodiment. In other example embodiments, selecting the Stylus option may present the user with a number of additional sub-options, one of which may include a so-called “stylus pressure-sensitive squeeze/tap” action option, which may then be selected by the user so as to cause the pressure-sensitive squeeze/tap action configuration sub-menu of FIG. 1e to be displayed. Any number of such menu schemes and nested hierarchies can be used, as will be appreciated in light of this disclosure. In other embodiments, the stylus control feature action function can be hard-coded such that no configuration sub-menus are needed or otherwise provided (e.g., squeeze/tap action while sufficiently proximate to the device for carrying out actions as described herein, with no user configuration needed). The degree of hard-coding versus user-configurability can vary from one embodiment to the next, and the claimed invention is not intended to be limited to any particular configuration scheme of any kind, as will be appreciated.

As will be appreciated, the various UI control features and sub-menus displayed to the user are implemented as UI touch screen controls in this example embodiment. Such UI touch screen controls can be programmed or otherwise configured using any number of conventional or custom technologies. In general, the touch screen translates the user touch (e.g., finger or stylus) in a given location into an electrical signal which is then received and processed by the underlying operating system (OS) and circuitry (processor, etc). Additional example details of the underlying OS and circuitry in accordance with some embodiments will be discussed in turn with reference to FIG. 2a . Note that similar touch screen technology may be used to implement the pressure-sensitive are on the stylus.

The stylus detection surface (or stylus detection display, in this example case) can be any surface that is configured with stylus detecting technologies capable of direct contact and/or non-contact (hovering) detection, whether capacitive, resistive, acoustic, active-stylus, and/or other input detecting technology. The screen display can be layered above input sensors, such as a capacitive sensor grid for passive touch-based input such as with a finger or passive stylus in the case of a so-called in-plane switching (IPS) panel, or an electro-magnetic resonance (EMR) sensor grid. In some embodiments, the stylus detection display can be configured with a purely capacitive sensor, while in other embodiments the touch screen display may be configured to provide a hybrid mode that allows for both capacitive input and EMR input, for example. In still other embodiments, the stylus detection surface is configured with only an active-stylus sensor. Numerous touch screen display configurations can be implemented using any number of known or proprietary screen-based input detecting technologies. In any such embodiments, a stylus detection surface controller may be configured to selectively scan the stylus detection surface and/or selectively report stylus inputs detected proximate to (e.g., within a few centimeters, or otherwise sufficiently close so as to allow detection) the stylus detection surface.

In one example embodiment, a stylus input can be provided by the stylus hovering some distance above the stylus detection display surface (e.g. one to a few centimeters above the surface, or even farther, depending on the sensing technology deployed in the stylus detection surface), but nonetheless triggering a response at the device just as if direct contact were provided directly on the stylus detection display. As will be appreciated in light of this disclosure, a stylus as used herein may be implemented with any number of stylus technologies, such as a DuoSense® pen by N-Trig® (e.g., wherein the stylus utilizes a touch sensor grid of a touch screen display) or EMR-based pens by Wacom technology, or any other commercially available or proprietary stylus technology. Further, recall that the stylus sensor in the computing device may be distinct from an also provided touch sensor grid in the computing device. Having the touch sensor grid separate from the stylus sensor grid allows the device to for example, only scan for an stylus input, a touch contact, or to scan specific areas for specific input sources, in accordance with some embodiments. In one such embodiment, the stylus sensor grid includes a network of antenna coils that create a magnetic field which powers a resonant circuit within the stylus. In such an example, the stylus may be powered by energy from the antenna coils in the device and the stylus may return the magnetic signal back to the device, thus communicating the stylus' location above the device, angle of inclination, speed of movement, and control feature activation (e.g., pressure-sensitive squeeze/tap action). In one particular example, the stylus sensor grid of the computing device includes more than one set of antenna coils. In such an example embodiment, one set of antenna coils may be used to merely detect the presence of a touching or hovering or otherwise sufficiently proximate stylus, while another set of coils determines with more precision the stylus' location above the device and can track the stylus' movements.

As previously explained, and with further reference to FIGS. 1d and 1e , once the Settings sub-menu is displayed (FIG. 1d ), the user can then select the Stylus option. In response to such a selection, the stylus pressure-sensitive squeeze/tap action configuration sub-menu shown in FIG. 1e can be provided to the user. The user can configure a number of functions with respect to the pressure-sensitive squeeze/tap action function, in this example embodiment. For instance, in this example case, the configuration sub-menu includes a UI check box that when checked or otherwise selected by the user, effectively enables the pressure-sensitive squeeze/tap action mode (shown in the enabled state); unchecking the box disables the mode. Other embodiments may have the pressure-sensitive squeeze/tap action mode always enabled (e.g., by default or hard-coded), or enabled by a physical switch or button located on either the device or the stylus, for example. In addition, once the pressure-sensitive squeeze/tap action mode is enabled in this example embodiment, the user can associate a number of functions with specific tap and/or squeeze action control using drop down menus, as variously shown in FIG. 1e . As can be further seen in this example embodiment, there are three main types of functions/actions that can be configured: UI Control Feature actions, Custom UI Control actions, and Secondary Function actions.

If the UI Control Feature check box is checked, the user can use the squeeze/tap function to operate on various UI control features currently displayed or otherwise relevant to current device performance, and particularly a given UI control feature to which the stylus is pointing. For instance, the squeeze/tap function can be engaged to change variables or tool features such as volume (e.g., if the stylus is touching or otherwise pointing at a displayed UI volume control feature, or a playback application is playing music or a video, then squeeze/tap action corresponds to volume control), font size or type (e.g. if the stylus is touching or otherwise pointing at a displayed UI font control feature, or a portion of text is selected on screen, then squeeze/tap action corresponds to font control), color (e.g., if the stylus is touching or otherwise pointing at a displayed UI color control feature, then squeeze/tap action corresponds to color control), line thickness or color (e.g., if the stylus is touching or otherwise pointing at a displayed UI line control feature, then squeeze/tap action corresponds to line control), margin size (e.g., if the stylus is touching or otherwise pointing at a displayed UI margin control feature, then squeeze/tap action corresponds to margin control), zoom (e.g., if the stylus is touching or otherwise pointing at a displayed UI zoom control feature, then squeeze/tap action corresponds to zoom control), painting or drawing tool (e.g., if the stylus is touching or otherwise pointing at a displayed UI painting/drawing tool control feature, then squeeze/tap action corresponds to changing that particular tool's configuration with respect to line width or color, for instance), switching tools within an active application (e.g. if a drawing or note taking application is running and no tool is yet selected, or if the stylus is touching or otherwise pointing at a displayed UI tool box control feature, then squeeze/tap action corresponds to selecting or otherwise changing to a desired tool), and other such variables. As will be appreciated in light of this disclosure, the computing device with which the stylus is interacting may display menus in response to the stylus-based pressure-sensitive control feature action, which can be navigated using further stylus-based pressure-sensitive control feature actions or other user input types (e.g., finger touch directly on touch screen of device, etc). In any such cases, the user can assign a given function to a squeeze or tap action using the pull-down menus shown in FIG. 1e . In the example shown, for instance, a squeeze will either increase a value or scroll forward and a tap will either decrease a value or scroll backward, depending on the target UI control feature. Further note in this example embodiment that the user may also check the ‘Squeeze Speed Diff’ check box and/or the ‘Tap+Hold Diff’ check box. Such a configuration could be used, for instance, to allow the rate of the desired function to be carried out faster (or slower, as the case may be) depending on the pressure applied (hence, a ‘speed differential’). For example, squeezing at a first pressure can increment or scroll forward at a first speed, squeezing at a second (harder) pressure can increment or scroll forward at a second (faster) speed, squeezing at a third (even harder) pressure can increment or scroll forward at a third (even faster) speed, etc. In a similar fashion, a quick tap-and-release can decrement or scroll backward at a first speed, a tap-and-hold (longer hold period than just a quick tap) can decrement or scroll backward at a second (faster) speed, a tap-and-hold (even longer hold period) can decrement or scroll backward at a third (even faster) speed, etc. Note that using squeezing for one direction and tapping for another direction is just one example, and other embodiments will be apparent in light of this disclosure. For instance, a squeeze at a relatively low pressure level could be used to decrease volume at a first speed and a squeeze at a relatively higher pressure level would decrease volume 10× faster. Other functions amenable to multi-rate implementation will be apparent in light of this disclosure (e.g., page turning, scrolling, zoom). If the check boxes are not checked, then any differential in pressure and tap hold time can be ignored. As will be appreciated, other pressure-types (e.g., single finger and/or thumb taps, press-and-holds, finger and/or thumb taps in series, alternating finger and/or thumb taps in various combinations, finger and/or thumb taps and/or squeezes occurring at particular locations along the pressure-sensitive area) can be assigned to functions in a similar fashion.

If the Custom UI Control check box is checked, the user can use the stylus-based pressure-sensitive control feature to perform some pre-selected or assigned task, which may depend, for example, upon the active application or context currently active on the computing device. For instance, in the example shown, if a note taking application is active and the user has taken notes therein, a squeeze action will cause the notes to be converted to a text file. In another example, if an application is active where the currently displayed work or content can be centered on the screen (e.g., artwork or any content with a designated center point), a tap action will cause that displayed work or content to be centered on the screen. Further note in this example embodiment that the user may also check the ‘Squeeze Speed Diff’ check box and/or the ‘Tap+Hold Diff’ check box. As previously explained, the degree or applied pressure or duration of a given tap can also be used as a speed differential. However, in other embodiments, it can be used to allow for numerous squeeze/tap combinations and corresponding assigned functions. For instance, note that some functions may be associated with multiple squeeze/tap actions, in accordance with an embodiment. For example. Table 1 shows some example pressure-based squeeze/tap actions and corresponding functions. If the Custom UI Control check box is not checked, then intermediate squeeze actions can be treated the same a full-squeeze actions, for example.

TABLE 1 Example Custom UI Control Actions Application/ Squeeze/ Context Tap Actions Function Paint/Drawing App tap Select line width tap for given tool Paint/Drawing App tap Select color for tap given tool tap Paint/Drawing App high pressure Save file to squeeze folder Audio Note Taking App low pressure Record squeeze Audio Note Taking App tap + hold Pause/Hold Audio Note Taking App release tap Release Pause/Hold Audio Note Taking App high pressure Save audio file squeeze to folder Note Taking App tap Use pencil tool Note Taking App tap Use highlighter tap tool Note Taking App tap Use eraser tool tap tap Note Taking App low pressure Change color of squeeze tool low pressure squeeze Note Taking App tap Change line low pressure thickness of tool squeeze Note Taking App medium pressure Convert notes to squeeze text file and save to folder Global/Launch App high pressure Launch Browser App squeeze tap Global/Launch App high pressure Launch Text squeeze Messaging App tap tap Global/Launch App high pressure Launch Music squeeze Search and tap Identification App tap tap

Further note in Table 1 that in some embodiments where a combination of squeeze and/or tap actions is used for a given function, that there may be a time period in which the overall squeeze and/or tap action must be completed to be treated as a single action. To this end, the processor (either in the stylus or the computing device) that receives signals that correspond to each squeeze/tap action can execute a timing function to detect combination squeeze/tap actions. For instance, as long as each sequential squeeze and/or tap action commences within 2 seconds of the previous squeeze and/or tap action ending, then that group of squeeze/tap actions will be treated as a squeeze/tap action that corresponds to a single function. On the other hand, if more than 2 seconds has elapsed from the end of one squeeze and/or tap action to the beginning of the next squeeze and/or tap action, then those squeeze and/or tap actions will be treated as two separate actions that may correspond to two separate functions. Further note that similar functionality can be applied to other stylus control features, such as a multiple stylus push-button presses used to represent a single action that corresponds to a single function, or multiple taps/gestures on a stylus-based touch-sensitive surface to represent a single action that corresponds to a single function.

If the Secondary Functions check box is checked, the user can use the stylus-based pressure-sensitive control feature to perform some pre-selected or assigned task, which is more global in nature and does not necessarily depend upon the content currently displayed or the currently active application or context of the computing device. With such Secondary Functions, further note that the stylus need not be pointing in any particular direction or at any particular content, but merely needs to be within an acceptable distance for its control feature actions to be detected by the stylus detection surface of the computing device. As previously explained, the user may also check the ‘Squeeze Speed Diff’ check box and/or the ‘Tap+Hold Diff’ check box, thereby allowing for a speed differential or various multi-squeeze/tap combinations (and the various corresponding functions). Examples of Secondary Functions include: select content/icon, run application, cut, copy, delete, undo, redo, next page, zoom in/out, adjust font size, adjust brightness, adjust volume, switch tool or application, skip scene, create a note (on device), or start an audio or video recording of a classroom lecture or other event (from device or stylus if stylus is configured to record/store sounds/video). Further examples of Secondary Functions include low-pressure-squeeze for next page/previous page; high-pressure-squeeze for next chapter/previous chapter; a tap to cut or copy; and a tap+hold for 3 to 5 seconds to paste the selected text.

In addition to squeezes of different pressure, a squeeze-and-hold on the pressure-sensitive area can be used do a squeeze action, but holding the squeeze action may keep the action going, in accordance with some embodiments. Thus, a squeeze-and-hold could be used for functions such as, for instance, cycling through fonts, colors, line thicknesses, and other such variables like a carousel. Similarly, if the action is to paginate/scroll pages, then a squeeze-and-hold on the pressure-sensitive area may continue to scroll pages until the hold is released. In some example cases, the user could increase a given variable or rate of action by some factor based on squeeze pressure in a given location before a hold point. For instance, if user executes a high-pressure-squeeze followed by a hold point, the UI can be configured to paginate 10 pages forward at a time, whereas a medium-pressure-squeeze followed by a hold point would paginate 5 pages forward at a time, whereas a low-pressure-squeeze would paginate 1 page forward at a time and would continue to paginate at a suitable rate (e.g., 1 page every 2-3 seconds) until a finger and/or thumb tap is received.

Thus, and as will be appreciated in light of this application, numerous stylus-based pressure functions may be configured on a content-specific level, an application-specific level, or on a global level wherein the action performs the same function regardless of the application running or type of content currently displayed at the time, and regardless of whether content is selected or what the stylus is pointing at. Note that the top button of the stylus shown in FIG. 1c may also be configured to perform functions as explained with reference to the pressure-sensitive control feature. Numerous variations and configurations will be apparent in light of this disclosure.

With further reference to the example embodiment of FIG. 1e , the user may also specify a number of applications in which the stylus-based pressure-sensitive control mode can be invoked. Such a configuration feature may be helpful, for instance, in a tablet or laptop or other multifunction computing device that can execute different applications (as opposed to a device that is more or less dedicated to a particular application). In this example case, the available applications are provided along with a corresponding check box, but could be a UI pull-down menu or some other suitable UI feature. Note the diverse nature of the example applications, including an eBook application, a photo viewing application, a browser application, a file manager application, a word processor, a document viewer, and a notes application, just to name a few examples. In this example case, a stylus squeeze/tap action can be associated with, for example, the next page function when an eBook is running, with the zoom-in function when a photo viewing/editing application is running, with a scroll function when a browser application is running, with the open function when a file manager application is running, and with the dictionary look-up function when a word processor application is running. In other embodiments, multiple stylus squeeze/tap actions may be associated with distinct functions for different applications. In other embodiments, the pressure-sensitive squeeze/tap mode can be invoked whenever the stylus is activated, regardless of the application being used. If so desired, the Global check box can be checked, so that a common scheme of stylus-based pressure-sensitive control functionality can be provisioned, which may be used in conjunction with an application based scheme or on its own, as so desired. Any number of applications or device functions may benefit from a stylus-based pressure-sensitive control mode as provided herein, whether user-configurable or not, and the claimed invention is not intended to be limited to any particular application or set of applications.

As can be further seen, a back button arrow UI control feature may be provisioned on the screen for any of the menus provided, so that the user can go back to the previous menu, if so desired. Note that configuration settings provided by the user can be saved automatically (e.g., user input is saved as selections are made or otherwise provided). Alternatively, a save button or other such UI feature can be provisioned, which the user can engage as desired. Numerous other configurable aspects will be apparent in light of this disclosure. Note that in some embodiments the various stylus actions may be visually demonstrated to the user as they are carried out via suitable function animations. Such animations may provide clarity to the function being performed, and in some embodiments the animations may be user-configurable while they may be hard-coded in other embodiments. Again, while FIGS. 1d-e show user configurability, other embodiments may not allow for any such configuration, wherein the various features provided are hard-coded or otherwise provisioned by default. The degree of hard-coding versus user-configurability can vary from one embodiment to the next, and the claimed invention is not intended to be limited to any particular configuration scheme of any kind. In an embodiment where the function was hard-coded, there may be a help module that provides a cheat sheet that the user can readily access to learn the various interface functionalities that can be achieved using the stylus-based pressure-sensitive control feature.

FIG. 2a illustrates a block diagram of an electronic computing device with a stylus sensitive display, configured in accordance with an embodiment of the present invention. As can be seen, this example device includes a processor, memory (e.g., RAM and/or ROM for processor workspace and storage), additional storage/memory (e.g. for content), a communications module, a display, a stylus detection surface, and an audio module. A communications bus and interconnect is also provided to allow inter-device communication. Other typical componentry and functionality not reflected in the block diagram will be apparent (e.g., battery, co-processor, etc.). Further note that in some embodiments the stylus detection surface may be integrated into the device display. Alternatively, the stylus detection surface may be a track pad, a housing configured with one or more acoustic sensors, a separate stylus-sensitive surface that may be connected to the device via cables or a wireless link, etc. As discussed above, the stylus detection surface may employ any suitable input detection technology that is capable of translating an action of a stylus touching or otherwise being sufficiently proximate to the surface into an electronic signal that can be manipulated or otherwise used to trigger a specific user interface action, such as those provided herein. The principles provided herein equally apply to any such stylus sensitive devices. For ease of description, examples are provided with stylus sensitive displays.

In this example embodiment, the memory includes a number of modules stored therein that can be accessed and executed by the processor (and/or a co-processor). The modules include an operating system (OS), a user interface (UI), and a power conservation routine (Power). The modules can be implemented, for example, in any suitable programming language (e.g., C, C++, objective C, JavaScript, custom or proprietary instruction sets, etc.), and encoded on a machine readable medium, that when executed by the processor (and/or co-processors), carries out the functionality of the device including a UI having a stylus-based, squeeze/tap function as described herein. The computer readable medium may be, for example, a hard drive, compact disk, memory stick, server, or any suitable non-transitory computer/computing device memory that includes executable instructions, or a plurality or combination of such memories. Other embodiments can be implemented, for instance, with gate-level logic or an application-specific integrated circuit (ASIC) or chip set or other such purpose built logic, or a microcontroller having input/output capability (e.g., inputs for receiving user inputs and outputs for directing other components) and a number of embedded routines for carrying out the device functionality. In short, the functional modules can be implemented in hardware, software, firmware, or a combination thereof.

The processor can be any suitable processor (e.g., 800 MHz Texas Instruments OMAP3621 applications processor), and may include one or more co-processors or controllers to assist in device control. In this example case, the processor receives input from the user, including input from or otherwise derived from the power button and the home button. The processor can also have a direct connection to a battery so that it can perform base level tasks even during sleep or low power modes. The memory (e.g., for processor workspace and executable file storage) can be any suitable type of memory and size (e.g. 256 or 512 Mbytes SDRAM), and in other embodiments may be implemented with non-volatile memory or a combination of non-volatile and volatile memory technologies. The storage (e.g., for storing consumable content and user files) can also be implemented with any suitable memory and size (e.g., 2 GBytes of flash memory). The display can be implemented, for example, with a 6-inch E-ink Pearl 800×600 pixel screen with Neonode® zForce® touch screen, or any other suitable display and touch screen interface technology.

The communications module can be configured to execute, for instance, any suitable protocol which allows for connection to the stylus so that stylus-based pressure-sensitive control feature actions may be detected by the device, or to otherwise provide a communication link between the device and the stylus or other external systems. Note in some cases that squeeze/tap actions of the stylus are communicated to the device by virtue of the stylus detection surface and not the communication module. For instance, the detection signals generated by the pressure-sensitive area of the stylus can be used to manipulate the resonant frequency of a stylus-based tank circuit that interacts with a stylus detection circuit of the computing device. In this sense, the communication module may be optional. Example communications modules may include an NFC (near field connection), Bluetooth, 802.11 b/g/n WLAN, or other suitable chip or chip set that allows for wireless connection to the stylus (including any custom or proprietary protocols). In some embodiments, a wired connection can be used between the stylus and device. In some specific example embodiments, the device housing that contains all the various componentry measures about 6.5″ high by about 5″ wide by about 0.5″ thick, and weighs about 6.9 ounces. Any number of suitable form factors can be used, depending on the target application (e.g., laptop, desktop, mobile phone, etc). The device may be smaller, for example, for smartphone and tablet applications and larger for smart computer monitor applications.

The operating system (OS) module can be implemented with any suitable OS, but in some example embodiments is implemented with Google Android OS or Linux OS or Microsoft OS or Apple OS. As will be appreciated in light of this disclosure, the techniques provided herein can be implemented on any such platforms. The power management (Power) module can be configured, for example, to automatically transition the device to low power consumption mode or sleep mode after a period of non-use. A wake-up from that sleep mode can be achieved, for example, by a physical button press and/or a pressure-sensitive, stylus-based squeeze/tap action, a touch screen swipe, or other action. The user interface (UI) module can be programmed or otherwise configured, for example, to carryout user interface functionality, including that functionality based on stylus-based control feature action detection as discussed herein and the various example screen shots and use-case scenarios shown in FIGS. 1a, 1d-e, 3a-d, and 4a-c , in conjunction with the stylus-based pressure-sensitive control feature methodologies demonstrated in FIG. 6, which will be discussed in turn. The audio module can be configured, for example, to speak or otherwise aurally present a selected eBook table of contents or other textual content, if preferred by the user. Numerous commercially available text-to-speech modules can be used, such as Verbose text-to-speech software by NCH Software. In some example cases, if additional space is desired, for example, to store digital books or other content and media, storage can be expanded via a microSD card or other suitable memory expansion technology (e.g., 32 GBytes, or higher). Further note that although a touch screen display (sensitive to stylus input) is provided, other embodiments may include a non-touch screen and a touch-sensitive surface such as a track pad, or a touch-sensitive housing configured with one or more acoustic sensors, etc.

FIG. 2b illustrates a block diagram of a stylus configured in accordance with an embodiment of the present invention. As can be seen, this example stylus includes a storage/memory and a communication module. A communications bus and interconnect may be provided to allow inter-device communication. An optional processor may also be included in the stylus to provide local intelligence, but such is not necessary in embodiments where the electronic computing device with which the stylus is communicatively coupled provides the requisite control and direction. Other componentry and functionality not reflected in the block diagram will be apparent (e.g., battery, speaker, antenna, etc). The optional processor can be any suitable processor and may be programmed or otherwise configured to assist in controlling the stylus, and may receive input from the user from control features including a top push-button and pressure-sensitive control feature, in this example case. The processor can also have a direct connection to a battery. The storage may be implemented with any suitable memory and size (e.g., 2 to 4 GBytes of flash memory). In other example embodiments storage/memory on the stylus itself may not be necessary.

The communications module can be, for instance, any suitable module which allows for connection to a nearby electronic device so that information may be passed between the device and the stylus. Example communication modules may include an NFC. Bluetooth, 802.11 b/g/n WLAN, or other suitable chip or chip set which allows for connection to the electronic device. In other embodiments, the communication module of the stylus may implement EMR or other similar technologies that can communicate stylus information to a device, including stylus location and whether a stylus control feature action has been performed, without a separate communications chip or chip set. In one such example, the stylus may include a communication module comprising a resonator circuit that may be manipulated using the various control features of the stylus, such as the pressure-sensitive control feature and/or push-button. In such an example, performing squeeze and tap actions on the stylus-based pressure-sensitive control feature can be used to adjust the resonant frequency of the resonator circuit (e.g., control signal generated by pressure-sensitive control feature is applied to varactor of tank, so as to vary resonant frequency). The altered resonant frequency may be detected by the stylus detection surface of the device, thus triggering a response at the device. Note in such a case that a separate dedicated communication module (e.g., Bluetooth, NFC, etc) may be optional, as previously explained. Further note that such a resonator circuit can be passive, and therefore not require any stylus-based battery or power source to operate.

In another example case, the stylus may include a processor and a communication module arrangement that can receive input from the various control features of the stylus, such as a pressure-sensitive control feature and/or push-button. The stylus further comprises an independent power source (e.g., a battery) in some embodiments, but may do without if the pressure-sensing control feature can function in a passively (e.g., by scavenging radiated power or otherwise function in a passive manner). The stylus-based pressure-sensitive surface is effectively a transducer that converts pressure into an actionable signal that a processor can then interpret and then direct the communication module (e.g., a transceiver) to send a corresponding control signal back to the computing device to implement the corresponding action on the device, in accordance with some embodiments. The mechanism by which the pressure-sensitive surface can translate pressure into signals may include, for example, piezoelectric technology, quantum tunneling composites technology, or other suitable transducer technology. In some such example cases, the stylus may also include a resonator circuit to facilitate interaction with the stylus detection surface as previously explained.

In another example case, the communications module may receive input directly from stylus control features such as the pressure-sensitive control feature and/or push-button, wherein such inputs can be used to enable a corresponding control signal to be sent by the communications module. As will be appreciated, commands may be communicated and/or target content may be transferred between (e.g., copied or cut or pasted) the stylus and the electronic device over a communication link. In one embodiment, the stylus includes memory storage and a transceiver, but no dedicated processor. In such an embodiment, the transceiver of the electronic device communicates with the stylus-based transceiver and the processor of the electronic device can then perform the various functions based on information received from the device-based transceiver. In this way, stylus-based user input can be used to control the device.

FIG. 2c illustrates a block diagram showing a communication link between the electronic computing device of FIG. 2a and the stylus of FIG. 2b , according to one embodiment of the present invention. As can be seen, the system generally includes an electronic computing device that is capable of wirelessly connecting to other devices and a stylus that is also capable of wirelessly connecting to other devices. In this example embodiment, the electronic computing device may be, for example, an e-Book reader, a mobile cell phone, a laptop, a tablet, desktop, or any other stylus-sensitive computing device. As described above, the communication link may include an NFC, Bluetooth, 802.11 b/g/n WLAN, electro-magnetic resonance, and/or other suitable communication link which allows for communication between one or more electronic devices and a stylus. In some embodiments. EMR technology may be implemented along with one or more of NFC, Bluetooth, 802.11 b/g/n WLAN, etc. In one such example, EMR may be used to power a stylus and track its location above a device while NFC may enable data transfer between the stylus and the device. In some embodiments, the stylus may be configured and/or recalibrated in real-time over the communication link. In one such example, the user may adjust stylus configuration settings using the various menus and sub-menus such as those described in FIGS. 1d-e and the stylus may be reconfigured in real-time over the communication link.

Example Stylus-Based Pressure-Sensitive Control Actions

FIGS. 3a-e illustrate an example stylus configured with a pressure-sensitive control feature and for use with an electronic computing device, in accordance with an embodiment of the present invention. As can be seen, in this particular configuration, the stylus comprises a stylus tip used to interact with the stylus detection surface (by either direct contact or sufficiently proximate indirect contact) and control features including a top button and a pressure-sensitive control feature area along the shaft of the stylus. As will be appreciated, the pressure-sensitive area may be situated around the circumference of the stylus in some embodiments. The previous discussion with respect to features such as stylus form factor and materials provided with reference to FIG. 1c is equally applicable here. In some embodiments, depending on the handedness of the user, a finger tap may be considered to be on the left side or on the right side of the pressure-sensitive area, and similarly, the thumb tap may be considered to be on the left side or on the right side of the pressure-sensitive area. As can be further seen with reference to FIG. 3a , the pressure-sensitive control feature generally includes a length along the longitudinal axis of the stylus. In some embodiments, the width of the pressure-sensitive control feature is less than the circumference of the stylus. In some embodiments, the pressure-sensitive control feature extends completely around the circumference of the stylus. Squeeze/tap actions of any kind can occur at any point on the overall area of the pressure-sensitive control feature, as will be appreciated in light of this disclosure.

FIG. 3b shows a user engaging the pressure sensitive control feature with a squeeze action. FIG. 3c shows a user engaging the pressure sensitive control feature with a finger tap action, and FIG. 3d shows a user engaging the pressure sensitive control feature with a thumb tap action. For simplicity the figures herein are shown with a right-handed user engaging the pressure sensitive control feature, but as can be appreciated from this disclosure, the stylus may be engaged by a left-handed user as well. In some embodiments, the pressure-sensitive control feature may sense or otherwise infer that a more forward tap (e.g. toward the tip of the stylus) is a finger tap, and a more rearward tap (e.g., further away from the tip of the stylus) is a thumb tap, given the position of a human hand when gripping a pen-like implement.

As can be further seen with reference to FIG. 3a , the pressure-sensitive control feature is active over a particular area of the stylus body, such as near the stylus tip or other suitable location to facilitate its use. In some embodiments, the pressure-sensitive control feature may be configured to detect taps and other squeeze/tap-types along the area of the pressure-sensitive control feature. As previously explained, a unique set of squeeze/tap actions on the pressure-sensitive area (including any such non-squeeze/tap pressure-types) can be used to indicate a desired function to be carried out in response to that squeeze/tap actions or set of squeeze/tap actions.

FIG. 4a illustrates an example use case for a stylus configured with a pressure-sensitive control feature and for interacting with an electronic computing device, in accordance with an embodiment of the present invention. In this example case, the stylus is being used to interact with an options menu that is currently displayed on the computing device with which the stylus is communicatively paired. As can be seen, the options menu includes a number of icons or UI control features with which the user can interact, including a Color Wheel, a Tools menu, a Settings menu, an Undo function, a Redo function, a Volume control feature, a zoom function, and a font size control feature. In this example case, the user is pointing the stylus at the volume icon, and is adjusting the volume of the device using the pressure-sensitive, stylus-based squeeze/tap feature. Depending on the specific squeeze/tap action used, the volume can be raised or lowered. Note the user may be touching the volume icon directly, or may be hovering over the volume icon to carry out this volume control action. As previously explained, note that the volume icon may manifest some indication so that the user knows that the stylus control action will be directed to that particular icon function. For instance, in this example embodiment, the volume icon is amplified in size relative to the other icons (e.g. like it is being looked at under a magnifying glass), so that it is evident to the user that whatever pressure-sensitive, stylus-based action is executed, it will be associated with the volume function.

FIG. 4b illustrates another example use case for a stylus configured with a pressure-sensitive control feature and for interacting with an electronic computing device, in accordance with an embodiment of the present invention. In this example case, the stylus is being used to interact with a Tools menu that is currently displayed on the computing device with which the stylus is communicatively paired. As can be further seen, the stylus of this example embodiment includes a pressure-sensitive control feature that is configured to receive pressure actions. In this example, a squeeze and/or tap action on the pressure-sensitive control feature can be used, for instance, to select icons or menu items to which the stylus is pointing or otherwise navigating. In the example shown, the stylus has been used to select the Tools menu (e.g., by a squeeze and/or tap action on the pressure-sensitive control feature, or just by virtue of the stylus pointing at the menu), which causes the Tools menu to pop-up on the display screen of the computing device. Once the Tools menu is on screen, the user can then use the stylus squeeze/tap feature to navigate the menu. In this example case, the user has chosen Pencil in the Tools menu (using the squeeze action and/or a tap action of the stylus-based pressure-sensitive control feature, or just by pointing the stylus accordingly, or by a combination of pointing and using a squeeze/tap action or series of squeeze/tap actions), which causes a Pencil sub-menu to pop-up on the display screen of the computing device. Once the Pencil sub-menu is on screen, the user can then use the stylus squeeze/tap feature to navigate the Pencil sub-menu and select the Pencil feature that is to be adjusted. In this example case, the user selects the Line Weight feature (using the squeeze action and/or tap actions of the pressure-sensitive squeeze/tap feature, or just by pointing the stylus accordingly, or by a combination of pointing and using a squeeze/tap action or series of squeeze/tap actions), which causes a Line Weight sub-menu to pop-up on the display screen of the computing device. Now the user can select a desired line weight, and commence to the use Pencil tool as desired. As previously explained, graphical animations or other indicators (e.g., differing chimes or vibrations as the menu is parsed) can be used to inform the user as to what icon or menu item the stylus is currently engaging to assist in the user selection process.

FIG. 4c illustrates another example use case for a stylus configured with a pressure-sensitive control feature and for interacting with an electronic computing device, in accordance with an embodiment of the present invention. In this example case, the stylus is being used to interact with the computing device, but without actually pointing at or otherwise selecting anything currently being displayed. As can be further seen, the pressure-sensitive, stylus-based squeeze/tap feature is communicated to the device via an EMR link in this example case (although other suitable communication links will be apparent in light of this disclosure). Recall, that the stylus-based pressure-sensitive control feature can be used to manipulate a resonant circuit of the stylus in some such embodiments, which in turn can be detected by an antenna-based, stylus detection surface of the device. Thus, for instance, the user may be enjoying an eBook on the device, or may be attending a lecture that includes presentation slides or other education materials that the user is viewing on screen as she/he follows along with the lecture. When appropriate, the user can engage the squeeze/tap feature to go to the next page of the book/presentation/etc. For example, finger tap actions can be used to page forward, squeeze actions can be used to page backward. As will be appreciated in light of this disclosure, holding a finger tap or a squeeze action for more than 2 seconds, for instance, can be used to cause an accelerated paging rate in a corresponding direction. Word selections made with the stylus (e.g., by direct touch or hovering over that word) combined with a subsequent stylus-based pressure-sensitive control feature squeeze and/or tap action can be used to launch a dictionary look-up or cause a knowledge information database to be accessed to provide more information about the selected word. Any number of such non-pointing stylus-based pressure-sensitive control feature actions can be configured, as will be apparent in light of this disclosure.

Pressure-Sensitive Squeeze/Tap Feature

FIGS. 5a-b ′ illustrate partial views and componentry of a stylus-based pressure-sensitive control feature configured in accordance with an embodiment of the present invention. As can be seen in FIG. 5a , the housing of the stylus includes a pressure-sensitive area. The pressure-sensitive area generally includes a length along the longitudinal axis of the stylus. In some embodiments, the width of the pressure-sensitive area is less than the circumference of the stylus. In some embodiments, the pressure-sensitive area extends completely around the circumference of the stylus. The housing can be implemented with any suitable material, such as plastic, metal, wood, etc. The pressure-sensitive control feature can be implemented with any suitable pressure sensor technology as previously explained.

FIG. 5b shows a longitudinal cross-section taken across the stylus body length as indicated by the dashed 5 b-5 b line of FIG. 5a . As can be further seen, the stylus includes a substrate upon which a detection/resonant circuit is provided, which may be passive or active in nature. In one example passive embodiment, this circuit includes a resonant circuit configured to resonate at a given frequency (in response to RF energy emitted by the stylus detection surface of the computing device) depending on the overall capacitance of the circuit, which can be affected by user contact on a pressure-sensitive area (which may be active or passive, depending on the transducer technology employed. In an example active embodiment, this circuit includes a processor, communication module, and power source (e.g., battery), wherein the processor can receive detection signals from the pressure-sensitive area (also coupled to the power source) and provide a corresponding command signal to the communication module for transmission to the computing device, which could then process the command signal. In other active embodiments with no processor, the detection signal can be provided directly to the communication module which would then transmit that detection signal to the computing device, which could then process the various distinct detection signals accordingly. Note that an active embodiment may also include the passive resonant circuit (hybrid of active and passive) which can also passively interact with the stylus detection surface of the computing device as previously explained (e.g., for purposes of detecting proximity and location of stylus, etc). The pressure-sensitive area can be operatively coupled to the underlying detection circuit via any suitable interconnect capable of providing detection signals (whether passive or active) to the detection/resonant circuit. The substrate can be implemented with any suitable material (e.g., plastic, ceramic, glass, etc) capable of supporting the various circuit elements of the stylus (e.g., as discussed with reference to FIG. 2b ).

FIG. 5b ′ shows an example resonant circuit that includes an inductor and a variable capacitor. As will be appreciated, a resonant circuit can be implemented with any number of passive components depending on factors such as the desired resonant frequency, and the example shown is not intended to limit the claimed invention to that particular example resonant circuit configuration. The capacitor is shown as variable to reflect that the overall capacitance of the circuit can be manipulated by the pressure-sensitive surface, in accordance with some embodiments. For instance, the resonant circuit can have its capacitive value changed by, for example, squeezing or tapping a finger on the pressure-sensitive surface, thereby causing a detection signal with can be used to change the capacitance and/or other variable element of that circuit. As will be appreciated in light of this disclosure, each unique pressure action (squeeze and/or tap) can effectively provide a unique change to the resonant circuit, which in turn can be passively or actively sensed by the stylus detection circuit of the computing device as a unique signature of that particular stylus-based pressure action. In particular, the pressure action will change the resonant frequency of the stylus tank circuit (detection/resonant circuit), which can then be picked up by a transmit/receive coil(s) of a digitizer included in the stylus detection surface of the computing device. This is the same effect used for individual buttons on the stylus, such as the push-button at the end of the stylus shown in FIG. 1c . In other embodiments, the stylus circuitry may be configured to actively detect pressure (an active pressure sensor, where an active detection signal is generated in response to user contact on the stylus-based pressure-sensitive surface, and that active detection signal can then be processed and/or communicated to the computing device. Numerous such active or passive or hybrid (both active and passive) detection and communication schemes will be apparent in light of this disclosure, and the claimed invention is not intended to be limited to any particular one or subset of such configurations.

Methodology

FIG. 6 illustrates a method for interacting with an electronic computing device using a stylus-based pressure-sensitive control feature, in accordance with an embodiment of the present invention. This example methodology may be implemented, for instance, by the UI module of the electronic computing device shown in FIG. 2a . To this end, the UI module can be implemented in software, hardware, firmware, or any combination thereof, as will be appreciated in light of this disclosure. The various stylus-based pressure-sensitive control feature actions may be communicated to the device over a communication link (e.g., EMR link, and/or dedicated communication link such as NFC or Bluetooth).

In general, any stylus-sensitive surface may be used on the computing device to detect the stylus touching, hovering over, or being otherwise sufficiently proximate to the device. As discussed above, EMR or other suitable technology may be implemented to detect the presence of a stylus directly or indirectly touching (e.g., hovering over) a stylus-sensitive display, as well as to communicate stylus actions to the electronic device. In one particular example, EMR technology may be implemented to power and/or track a stylus touching or otherwise being sufficiently proximate to a stylus-sensitive display. In one such example, a control feature action may be passively communicated from the stylus to the device by manipulating the resonant frequency of a resonant circuit within the stylus. As previously explained, this change in resonant frequency may be detected by the antenna coils of the stylus detection grid, thus triggering a response at the device, in accordance with some such embodiments. Various control features and/or control feature actions of the stylus may create different changes in resonant frequency, and thus may be assigned distinct functions. The stylus detection grid may track the location of the stylus, thus determining whether the stylus is pointing at selected content, a UI control feature or icon, a specific area of the stylus sensitive display, etc. These main detections can be used in various ways to implement UI functionality. In other example embodiments, stylus pressure-sensitive control feature actions can be actively detected and communicated to the device.

In this example case, the method is used in conjunction with a stylus-based pressure-sensitive control feature and includes determining 601 whether user input has been received, which may include input received when the stylus is hovering over or is otherwise sufficiently proximate to the stylus detection surface, or any other user input. In some embodiments, monitoring for stylus input includes monitoring all or part of a stylus sensitive display screen. In general, the user input monitoring is effectively continuous, and once a user input has been detected, the method may continue with determining 603 whether a stylus-based pressure-sensitive control feature signal has been received. If not, the method continues with reviewing 604 the user input for other UI requests (such as pressure-based stylus input).

If, however, a stylus-based pressure control feature signal has been received, the method continues with determining 605 if the stylus is pointing to a UI control feature. If so, the method continues with determining 607 if the stylus is pointing to a variable (e.g., such as a UI control feature that can be manipulated to directly control a value such as volume, font size, line size, or any other such variables). If so, then the method continues with adjusting 608 the target variable up or down, depending on the pressure action provided. If the stylus is not pointing to a variable, then the method continues with determining 609 if the stylus is pointing to a menu. If so, then the method continues with navigating 610 the target menu, depending on the pressure action provided. In some cases, once the user has navigated to the choice of interest in a given menu, the user may select that choice, for example, by touching it with the stylus tip, clicking a button on the stylus, tapping the pressure-sensitive area, or hovering over that menu item for more than 2 or 3 seconds. If the stylus is not pointing to a menu, then the method continues with determining 611 if the stylus is pointing to a specific tool. If so, then the method continues with scrolling or otherwise navigating 612 the target tool customizations, depending on the pressure action provided. Just as with a menu item, once the user has navigated to a tool customization of interest, the user may select that choice with further appropriate stylus action. If the stylus is not pointing to a specific tool, then the method continues with determining 613 if a customized action should be performed. In some such cases, the custom action may have been configured by the user (as explained with reference to FIG. 1e , for example). Alternatively, the custom action may be some default action or an action that is otherwise hard-coded. In any case, if a customized action should be performed, then the method continues with performing 614 that action (e.g., which may be, for instance, converting hand-written notes currently on display to a text file, or converting an audio recording just taken by the device into a text file, or saving a project just created on screen into a file). If a customized action should not be performed, then the input can be ignored or otherwise reviewed for some other intended action as may be appropriate.

With further reference to the determination at 605, if the stylus is not pointing to a UI control feature, then the method continues with determining 615 if a pressure-based secondary action should be performed. In some such cases, the secondary action may have been configured by the user (as explained with reference to FIG. 1e , for example). Alternatively, the secondary action may be some default action or an action that is otherwise hard-coded. In any case, if a secondary action should not be performed, then the input can be ignored or otherwise reviewed for some other intended action as may be appropriate. On the other hand, if a secondary action should be performed, then the method may continue with determining 617 if the secondary action is a redo or undo action. As will be appreciated in light of this disclosure, this determination may be guided by a previous user configuration or a hard-coded response, or may be based on the context of the current state of the computing device (e.g., based on whether or not the user currently editing or creating content). In any case, if an undo/redo action is requested, then the method continues with performing 618 that undo/redo action. If an undo/redo action is not requested, then the method may continue with determining 619 if the secondary action is a launch/close application action. If so, then the method continues with launching or closing 620 the application currently active on the device (or the application that is otherwise designated). If a launch/close application is not requested, then the method may continue with determining 621 if active application control is being requested. Again, this determination may be guided by a previous user configuration or a hard-coded response, or may be based on the context of the current state of the computing device (e.g., if eBook is open, then turn page; if photo viewer is open, then go to next photo).

Numerous variations and embodiments will be apparent in light of this disclosure. One example embodiment of the present invention provides a system including an electronic device having a display for displaying content to a user and a stylus detection surface for allowing user input via a stylus, and a user interface executable on the device and configured to perform a function in response to a stylus-based pressure-sensitive control feature input provided without direct contact between the stylus detection surface and stylus. In some cases, the function that is performed in response to the stylus-based pressure-sensitive control feature input is user-configurable. In some cases, the stylus detection surface comprises at least one set of antenna coils configured to detect changes in a resonant circuit within the stylus. In some such cases, the stylus detection surface includes a second set of antenna coils configured to detect at least one of location, speed of stylus movement, angle of stylus inclination and/or a change in resonant frequency of the resonant circuit within the stylus. In some cases, the system includes the stylus, wherein the stylus comprises a pressure-sensitive control feature input for providing the stylus-based pressure-sensitive control feature input. In some such cases including the stylus, manipulating the pressure-sensitive control feature creates a change in resonant frequency of a resonant circuit within the stylus. In some such other cases including the stylus, the stylus is configured to communicate with the electronic device over a wireless communication link. In some such cases, the stylus can be configured in real-time over the wireless communication link. In some cases, the stylus-based pressure-sensitive control feature input comprises a combination of squeeze and/or tap actions. In some cases, the function that is performed in response to the stylus-based pressure-sensitive control feature input is one of a plurality of functions that can be performed in response to specific stylus-based pressure-sensitive control feature input. In some cases, the electronic device is configured to provide at least one of an audio and/or visual notification associated with a function. In some cases, the function that is performed in response to the stylus-based pressure-sensitive control feature input is determined based on stylus location over the stylus detection surface. In some cases, the display is a touch screen display and includes the stylus detection surface. In some cases, the electronic device is an eReader device or a tablet computer or a smartphone. In some cases, the function performed in response to a stylus-based pressure-sensitive control feature input includes at least one of adjusting a variable, executing a particular command, switching between tools, modifying a particular tool's settings, and/or launching an application.

Another example embodiment of the present invention provides a system including an electronic device having a display for displaying content to a user and a stylus detection surface for allowing user input, a stylus having a pressure-sensitive control feature (wherein the stylus is configured to communicate with the electronic device), and a user interface executable on the device and configured to perform a function in response to a stylus-based pressure-sensitive control feature input. In some cases, the stylus-based pressure-sensitive control feature input is derived from one or more squeeze-types, one or more tap-types, or a combination thereof on the pressure-sensitive control feature.

Another example embodiment of the present invention provides a computer program product including a plurality of instructions non-transiently encoded thereon to facilitate operation of an electronic device according to a process. The computer program product may include one or more computer readable mediums such as, for example, a hard drive, compact disk, memory stick, server, cache memory, register memory, random access memory, read only memory, flash memory, or any suitable non-transitory memory that is encoded with instructions that can be executed by one or more processors, or a plurality or combination of such memories. In this example embodiment, the process is configured to display content to a user via an electronic device having a stylus detection surface for allowing user input via a stylus, and perform a function in response to a stylus-based pressure-sensitive control feature input provided without direct contact between the stylus detection surface and stylus. In some cases, the function comprises at least one of performing an undo action, performing an redo action, launching a note taking application, recording a sound and/or images, or switching from a first tool to a second tool. In some cases, the stylus detection surface is configured to detect a change in stylus resonant frequency caused by a stylus-based pressure-sensitive control feature that provides the stylus-based pressure-sensitive control feature input.

The foregoing description of the embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible in light of this disclosure. It is intended that the scope of the invention be limited not by this detailed description, but rather by the claims appended hereto. 

What is claimed is:
 1. A system for performing a function in response to receiving input from a stylus that includes an elongated body portion having a main axis, a tip on an end of the elongated body portion, and a pressure-sensitive control feature on the elongated body portion, the system comprising: an electronic device having a display for displaying content to a user and a stylus detection surface for allowing user input via at least one of direct and proximate contact by the stylus tip; and a user interface executable on the electronic device and configured to perform a function in response to input provided via the stylus-based pressure-sensitive control feature, the input including squeezing the pressure-sensitive control feature so as to deflect the pressure-sensitive control feature in a direction substantially perpendicular to the main axis of the elongated body portion of the stylus, the stylus-based pressure-sensitive control feature input provided without direct contact between the stylus detection surface and the stylus; wherein a first function is performed in response to a first squeeze pressure applied to the stylus-based pressure-sensitive control feature and a second function different from the first function is performed in response to a second squeeze pressure applied to the stylus-based pressure-sensitive control feature, the second squeeze pressure having a relatively higher pressure than the first squeeze pressure.
 2. The system of claim 1 wherein the stylus-based pressure-sensitive control feature input is based on one of at least three different available squeeze pressures.
 3. The system of claim 2 wherein the function performed is further based on the squeeze duration of the stylus-based pressure-sensitive control feature.
 4. The system of claim 1 further comprising the stylus, wherein the stylus is communicatively paired with the electronic device.
 5. The system of claim 4 wherein the stylus is configured to communicate with the electronic device over a wireless communication link.
 6. The system of claim 4 wherein the stylus-based pressure-sensitive control feature input is based on one of at least three different available squeeze pressures.
 7. The system of claim 4 wherein squeezing the pressure-sensitive control feature creates a change in resonant frequency of a resonant circuit within the stylus.
 8. The system of claim 1 wherein the function that is performed is further based on the squeeze duration of the stylus-based pressure-sensitive control feature.
 9. The system of claim 1 wherein the function that is performed in response to the stylus-based pressure-sensitive control feature input is independent of stylus location relative to displayed content.
 10. The system of claim 1 wherein the electronic device is further configured to provide at least one of an audio and visual notification associated with the function.
 11. The system of claim 1 wherein the function that is performed in response to the stylus-based pressure-sensitive control feature input is determined based on stylus location over the stylus detection surface.
 12. The system of claim 1 wherein a third function different from the first and second functions is performed in response to a tap action applied to the stylus-based pressure-sensitive control feature.
 13. The system of claim 1 wherein the function performed in response to the stylus-based pressure-sensitive control feature input includes at least one of adjusting a variable, executing a particular command, switching between tools, modifying a particular tool's settings, and launching an application.
 14. A system for performing a function in response to receiving input from a stylus that includes an elongated body portion having a main axis, a tip on an end of the elongated body portion, and a pressure-sensitive control feature on the elongated body portion, the system comprising: an electronic device having a display for displaying content to a user and a stylus detection surface for allowing user input via at least one of direct and proximate contact by the stylus tip; and a user interface executable on the electronic device and configured to perform a function in response to input provided via the stylus-based pressure-sensitive control feature, the input including squeezing the pressure-sensitive control feature so as to deflect the pressure-sensitive control feature in a direction substantially perpendicular to the main axis of the elongated body portion of the stylus, the stylus-based pressure-sensitive control feature input provided without direct contact between the stylus detection surface and the stylus; wherein a first function is performed in response to a first squeeze duration applied to the stylus-based pressure-sensitive control feature and a second function different from the first function is performed in response to a second squeeze duration applied to the stylus-based pressure-sensitive control feature, the second squeeze duration having a relatively longer duration than the first squeeze duration.
 15. The system of claim 14 further comprising the stylus, wherein the stylus is communicatively paired with the electronic device.
 16. The system of claim 14 wherein the stylus-based pressure-sensitive control feature input is based on one of multiple available squeeze pressures.
 17. A non-transitory computer program product encoded with instructions that when executed by one or more processors cause a process to be carried out, the process comprising: display content to a user via an electronic device configured to receive input via a stylus that includes an elongated body portion having a main axis, a tip on an end of the elongated body portion, and a pressure-sensitive control feature on the elongated body portion, the electronic device having a stylus detection surface for allowing user input via at least one of direct and proximate contact by the stylus tip; and perform a function in response to input provided via the stylus-based pressure-sensitive control feature, the input including squeezing the pressure-sensitive control feature so as to deflect the pressure-sensitive control feature in a direction substantially perpendicular to the main axis of the elongated body portion of the stylus, the stylus-based pressure-sensitive control feature input provided without direct contact between the stylus detection surface and the stylus; wherein a first function is performed in response to a first squeeze pressure applied to the stylus-based pressure-sensitive control feature and a second function different from the first function is performed in response to a second squeeze pressure applied to the stylus-based pressure-sensitive control feature, the second squeeze pressure having a relatively higher pressure than the first squeeze pressure.
 18. The non-transitory computer program product of claim 17 wherein the function performed is based on both the squeeze pressure applied to the stylus-based pressure-sensitive control feature and the squeeze duration of the stylus-based pressure-sensitive control feature.
 19. The non-transitory computer program product of claim 17 wherein the function that is performed in response to the stylus-based pressure-sensitive control feature input is independent of stylus location relative to displayed content.
 20. A non-transitory computer program product encoded with instructions that when executed by one or more processors cause a process to be carried out, the process comprising: display content to a user via an electronic device configured to receive input via a stylus that includes an elongated body portion having a main axis, a tip on an end of the elongated body portion, and a pressure-sensitive control feature on the elongated body portion, the electronic device having a stylus detection surface for allowing user input via at least one of direct and proximate contact by the stylus tip; and perform a function in response to input provided via the stylus-based pressure-sensitive control feature, the input including squeezing the pressure-sensitive control feature so as to deflect the pressure-sensitive control feature in a direction substantially perpendicular to the main axis of the elongated body portion of the stylus, the stylus-based pressure-sensitive control feature input provided without direct contact between the stylus detection surface and the stylus; wherein a first function is performed in response to a first squeeze duration applied to the stylus-based pressure-sensitive control feature and a second function different from the first function is performed in response to a second squeeze duration applied to the stylus-based pressure-sensitive control feature, the second squeeze duration having a relatively longer duration than the first squeeze duration.
 21. The non-transitory computer program product of claim 20 wherein the stylus-based pressure-sensitive control feature input is based on one of multiple available squeeze pressures. 